Problem database last updated: June 20, 2025
5 problems · 2 Easy, 2 Medium, 1 Hard · Ranked #231 of 458
2 Easy
40% · avg 23%
2 Medium
40% · avg 59%
1 Hard
20% · avg 18%
Based on 5 reported problems, Publicis Sapient interviews are in line with industry averages - 20% Hard vs 18% overall.
Compared to the industry average, Publicis Sapient puts unusual emphasis on stack (40% of problems, 4.6x the industry average), string (60% of problems, 2.1x the industry average), hash-table (40% of problems, 1.8x the industry average). If you're short on time, these are the categories to double down on.
The most common topics are array (60%), string (60%), stack (40%), hash-table (40%). Problems below are sorted by frequency, the ones at the top are asked most often.
| Problem | Difficulty | Frequency | Topics | |
|---|---|---|---|---|
Trapping Rain Water Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining. | Hard | Very Likely | arraytwo-pointersdynamic-programming | Solve |
Two Sum Given an array of integers nums and an integer target, return the indices of the two numbers that add up to target. | Easy | Very Likely | arrayhash-map | Solve |
Longest Substring Without Repeating Characters Given a string s, find the length of the longest substring without duplicate characters. | Medium | Very Likely | hash-tablestringsliding-window | Solve |
Valid Parentheses Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. | Easy | Very Likely | stringstack | Solve |
Group Anagrams Given an array of strings strs, group the anagrams together. You can return the answer in any order. | Medium | Very Likely | arrayhash-tablestring | Solve |
Trapping Rain Water
SolveGiven n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining.
Two Sum
SolveGiven an array of integers nums and an integer target, return the indices of the two numbers that add up to target.
Longest Substring Without Repeating Characters
SolveGiven a string s, find the length of the longest substring without duplicate characters.
Valid Parentheses
SolveGiven a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid.
Group Anagrams
SolveGiven an array of strings strs, group the anagrams together. You can return the answer in any order.
Frequency scores are based on crowdsourced interview reports. A higher score means the problem has been reported more often in recent Publicis Sapient interviews.
Very Likely
75-100%
Likely
50-74%
Sometimes
25-49%
Rare
0-24%
Publicis Sapient interviews focus heavily on array, string, stack problems. If you're short on time, these are the categories to prioritize. The problems on this page are sorted by frequency, so start from the top and work your way down.
Beyond solving problems, practice explaining your approach. Publicis Sapient interviewers care about your thought process - how you break down a problem, consider edge cases, and evaluate tradeoffs between solutions. A clean O(n) solution you can explain clearly beats an O(log n) solution you can't articulate.
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Publicis Sapient has been reported to ask 5 distinct coding problems. The most common topics are array, string, stack. 2 are Easy difficulty, 2 are Medium, and 1 are Hard. Problems are sorted by frequency - the ones at the top are asked most often.
Based on 5 reported problems, Publicis Sapient interviews are in line with industry averages - 20% Hard vs 18% overall. 40% of questions are Medium difficulty. Focus on the high-frequency Medium problems first, then work through the Hard ones.
Start with the highest-frequency problems listed on this page. Focus on the core topics: array, string, stack. Practice solving them under time pressure and explaining your approach out loud. Mock interviews with AI can simulate the real experience.
Simulate a real Publicis Sapient coding interview with an AI interviewer. Get a scorecard with specific feedback on your problem-solving, code quality, and communication.
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